<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        #result {
            width: 200px;
            height: 180px;
            border: 1px solid blue;
        }
    </style>
</head>

<body>
    <button>点击发送请求</button>    
    <div id="result">

    </div>
    <script>
        const btn = document.getElementsByTagName('button')[0];
        const result = document.getElementById('result');
        btn.addEventListener('click', function() {
            // console.log('test');
            const add = new XMLHttpRequest();
            add.open('GET', 'http://127.0.0.1:8000/ie?t='+Date.now());
            add.send();
            add.onreadystatechange = function() {
                if(add.readyState == 4) {
                    if(add.status >= 200 && add.status < 300) {
                        result.innerHTML = add.response;
                    }
                }
            }
        })
    </script>
</body>
</html>